Portable baker&#39;s oven



G. L. GAY. l PORTABLE BAKERS OVEN. APPLICATION r|LED1uNE5.1919.

Patented May 25, 1920. v

2 SHEETS-SHEET l.

PORTABL BAKERS ovEN.

APPLICATION FILED JUNE 5| |919.

1,340,946, lPatented May25,192o.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

GEORGE L. GAY, F PHILADELPHIA, PENNSYLVANIA, ASSIGNGR OF ONE-HALF T0 FRANK WHITTMANN, 0F PHILADELPHIA, PENNSYLVANIA.

To all al1/wm t may concer/n Be it known that I, GEORGE L. GAY, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia 5 and State of Pennsylvania, have invented new and useful Improvements in Portable Bakers Ovens, of which thefollo'wing is a specification.

My invention relates to a new and useful i0 improvement in bakers portable ovens, and has for its object to so construct such an oven that cork brick may be used in erecting the l same; and A further object of my invention is to so i5 place -the heating pipes in such an oven as to facilitate the heating of the interior of the oven and prevent the banking or stagnation of the air beneath the shelves.

lVith these ends in view, this invention consists in the details of construction and combination of elements hereinafter set forth and then specifically designated by the claims.

In order that those skilled in the art to which this invention appertains, may understand how to make and use the same, I will describe its construction in detail, referring by numerals to the accompanying drawings forming a part of this application, in which 1?- Figure l, isa vertical longitudinalV central section of the oven made in accordance with my improvement; and

Fig. 2, is a section at the Lline 2-2 yof Fig.

In carrying out my invention as here em,- bodied, l represents the baking chamber of a portable oven, 2 the heating chamber and 3 the grate bars. The walls of the heating chamber or flue are composed of the fire brick l having an asbestos or similary lining 5 and around this asbestos lining are erected the walls of the cork brick 6. The walls which surround the baking chamber 1 are also composed of cork brick and the entire structure is inclosed in sheet metal plates 7 and these plates may have flanges 8 formed therewith by means of which they are secured together by the bolts or screws 9. Thus it will be seen that the furnace may be readily erected and when closed in the metal plates will be rigid and durable and yet when it is desired to pull down the furnace it is only necessary to remove these plates when the cork brick may be removed Specification of Letters 'Patent 1 1 :PORTABLE BAKEas ovEN.

Patented May 25, 1920.

. l Application filed June 5j 1919. Serial No. 302,068.`

one by one for the rerection of the furnace in any other desired location. By constructmg a furnace in this manner it will be suiii ciently light for erection on upper iioors of buildings without the necessity of under 60 pinning on the erection of heavy foundations and may be readily changed from one location. to another.

By the vuseof fire brick in the walls of the heating chamber or flue and backing these lire bricks with asbestos lining the cork bricks are protected against a greater degree of heat so that the furnace will have all the advantages of an ordinary stationary brick furnace with the added-advantage of marked decrease in weight and a further advantage of preventing an undue radiation of heat since the asbestos and cork brick serve as insulation. l

The baking chamber l is divided into a number of compartments by the shelves l0 each of which is composed of an upper and lower tier of pipes 11 having asbestos or similar lining there between and these shelves are set at an angle as clearly shown in Fig. l, and projecting through the rear wall of the furnace into the heating chamber 2 said pipes being filled with fluid s0 that when their inner ends are heated this heat will be transmitted to the baking chamber as will be readily understood.

,The inclining of the shelves will permit the hot air beneath each shelf to have a forward circulating movement thus preventing the banking or stagnation of this air under the shelves which will greatly faciliate the transmission of the heat from the pipes to the baking chamber.

In practice it will be found that a portable oven constructedin'accordance with my in- 95 vention will carry on the baking process with less consumption of fuel and as it be verected and operated upon the upper floors of a building better sanitary conditions can be maintained.

Of course I do not wish to be limited to the exact details of construction as herein shown as these may be varied within the limits of the appended claims without departing fromthe spirit of my invention.

Having thus fully described my invention, what I claim as new and useful is l. A portable oven having a baking chamber therein, the walls of said baking chamber being composed of cork brick, aheating cham- 110 ber the Walls of which -ai'e composed of lire brick land a lining of asbestos separating the Walls dfi the cork brick yfrom. the Walls ofi-the lire brick. Y-

2. A portablel Oven having a baking cha-mber therein, the Walls of said baking chamber being composed of cork brick, a heating -chamber thewa'lls ofwhich are composed of fire brick, a lining of asbestos separating .the Wallsof the coik'brick Ifrom the Walls ofthe irebriek, .and .sheets of metal inelosingthe Y cork fbrick. e

' 3. InV an oven of the character described, a

baking chaiiiber, ,a f heating chamber, k,pipes leading from. the 'heating chamber fto .the 'baking ,chamber-,onen incline, cork bricks affixed my signature.

surrounding the heating'chamber, andan asbestos lining interposed betweenthe yfie brick` and the cork brick.

4. In anwoven ofthecharacter described, a bakingcliamber, a heating chamber, pipes leading from the heating chamber to the Vbaking chamber on an incline, eor-kfbricks siiiroiindingthe baking chamber, fire bricks surrounding the baking chamber, iire bricks surrounding the 'heating chamber, an asbes-VY tos lining interposed betweenthefire brick and'- the cork briekgand fa metal sheaving iiielosingthe entire structure. I. VIn testimony whereof, Il have `hereunto fenoiieii'nekr. 

